Khaki is a color that is
visualized as a light shade of yellow-brown. In Western fashion, it is a
standard color for smart casual dress trousers for civilians, which are also
often called khakis.

Khaki is a loanword incorporated
from Hindustani (meaning "soil-colored") and is originally derived from the
Persian (Khâk, literally meaning "soil"), which came to English from British
India via the British Indian Army. A khaki uniform is often referred to as
khakis.

The type of pant known as
"khakis", which became popular following World War II, were initially
military-issue khaki twill used in uniforms and were invariably khaki in color.
Today, the term can refer to the fabric and style of trousers based on this
older model, also called "chinos",
rather than their color. The term chinos pants and khaki pants are often
used interchangeably but they do have differences. Both are made from
twill fabric, but the stitching when sewing the pants and the fabric weight may
differ.

Khaki may have originated for
battle but is popular for the love of fashion as well:

Khaki has been used by many armies around the world for
uniforms, including camouflage. It has been used as a color name in English
since 1848 when it was first introduced as a military uniform, and was called
both drab and khaki. Khaki being a translation of the English drab
light-brown color.

The United States Army adopted khaki during the
Spanish–American War (1898). The United States Navy and United States Marine
Corps followed suit.

When khaki was adopted for the continental British
Service Dress in 1902, the shade chosen had a clearly darker and more green hue.
This color was adopted with minor variations by all the British Empire Armies
and the US expeditionary force of World War I, in the latter under the name
olive drab. This shade of brown-green remained in use by many countries
throughout the two World Wars. Khaki was devised to protect soldiers against the
dangers of the industrialized battlefield, where the traditional bright colors
and elaborate costumes made them vulnerable to attack. A response to
surveillance technologies and smokeless guns, khaki could camouflage soldiers in
the field of battle.

Although the khaki color and pant style is often used in
battle it is also utilized for the love of fashion. The color and pant
style is a stable in many wardrobes. The garment is worn by men, women,
and children. This pant is often worn by most age groups as well.
Khaki pants are possibly less formal than chinos but can be worn for many
various occasions.